Lacuna Dragon
In the old tongue, "lacuna" means "lake of the abyss" -- and it was in the abyss of the Rift that the wizard Anne T. Matre discovered the lacuna dragon. The clever witch, an expert in revealing hidden things, devised a spell to track dragons in the miasmic ether. After some time spent following what turned out to be Gwyddion in a dragon disguise (he, too, has his ways of finding dragons), Anne happened upon the luminous glow of the lacuna. She was so transfixed by the dragon's flowing tail, so much like the coral that once grew in the Surface oceans, she nearly lost her way back! Well, at least she could've kept Roger company.